Adjustable crank



Oct. l924o A. E. SIMPSON ET AL ADJUSTABLE CRANK Filed Nov. 22, 1922 Patented 0a 2c, 1924.

ATENT gem ARTHUR E. snvrrson, or nnatrn, AND rnrmr s. WHITE, or new LISZBON, INDIANA.

ADJUSTABLE CRANK.

Application filed. November 22, 1922. Serial No. 602,606.

To all whom it may 007L667'7t.

Be it known that we, ARTHUR E. SIMPSON- and PHILIP S. VVHITE, citizens of the United States, residin at Dublin, in the county of lVayne and btate of Indiana, and New Lisbon, in the county of Henry and State of Indiana, respectively, have invented certain new and useful Improvements in Adjustable Cranks, of which the following is a specification.

This cranks.

An object of the invention is the provision of a crank construction whereby a reciprocating member may be connected to a rotating shaft or element and radially adjusted to vary the throw of the reciprocating member.

A further object is the provision of a drive mechanism particularly adapted for operating the shoes of a grain separator.

In the accompanying drawings, we have shown one embodiment of the invention. In this showing:

Figure 1 is a sectional View of a portion of a grain separator showing the invention applied,

Figure 2 is a front elevation of the end of a drive shaft showing the invention ap plied,

Figure 3 is an end elevation of the crank construction, and,

Figure 4 is a perspective view of an eccentric arm' detached.

In Figure 1 of the drawings, we have shown the invention applied to a grain separator provided with screens 11 and a feed board 13. The machine is provided with a main shaft 14 having a pulley 15 adapted to receive a pulley 16 passing over a pulley on a drive shaft 18. A fan 19 is mounted on this shaft within a casing 20.

The tables are connected to the fan shaft 18 by means of a pivoted rod which is eccentrically mounted on the shaft and it may be adjusted to vary the throw of the rod. As shown, a casting 24 is secured to each end of the shaft, the casting being provided with a recess for the reception of the shaft and invention relates to adjustable being maintained thereon by a set screw 25.

This casting is provided with a sleeve 26 having an opening disposed at right angles to the shaft. This sleeve is adapted to receive one end of a substantially L-shaped eccen ric ever 27. As shown, the lever is provided with a flattened side 28, adapted to i be engaged by a set screw 29 passing through the sleeve. The other arm 30 of the eccentric lever is provided with a pair of spaced openings for the reception of cotter pins 31. A hard steel bearing roller 32 surrounds the shaft between these openings and a pair of washers or disks 33 may be arranged between the cotter pins and the bearing member.

The operation of the device is as follows:

By loosening the set screw 29, the arm 27 may be adjusted in the sleeve 26 to dispose the center of the laterally extending arm of the eccentric lever 27 at a desired distance from the center of shaft 18. This varies the throw of the eccentric as desired and a rod or pitman is connected to the laterally extending arm surrounding the hard steel bearing roller 32. The disks 33 retain the pitman or rod in position and the disks are retained in position by the cotter pins 31. The upper inclined'shoe 8 contains perforated plates or screens to suit the various kinds and sizes of grains or seed. The grain deliveredfrom this shoe passes on to the feed board 13 to the lower shoe. The lower shoe is provided with two screens of different sizes to separate grains or seeds into two difl'erent grades or classes. The very fine material or screenings is delivered to the bottom of the shoe and passes out through an opening (not shown) under the machine. As the grain is delivered on to the feed board 13, it is treated with a blast of air from the'fan 19 which blows off all dust and light grain to the rear of the shoe, whence it passes to the bottom through the discharge opening referred to above.

The space above each of the screens 11 and 12 is connected to an outlet opening, each of which communicates with one of the sections of the elevator. The two sizes or grades of grain are thus delivered to the spouts 58, separated from each other whence they may be placed in bags in the usual manner.

It is to be understood that the form of the invention herewith shown and described is to be taken as a preferred example of the same, and that various changes in the shape, size, and arrangement of parts may be re sorted to without departing from the spirit of the invention or the scope of the subj ined. c aim.

Having thusdescribed our invention, We claim:

Drive mechanism for grain separators comprising a shaft, a casting secured to the end of said shaft, said casting being provided With a relatively flat face, a sleeve formed on the flat face of said casting and arranged at right angles to said shaft, a substantially Lshaped lever having one arm adjustably mounted in said sleeve, the other arm of said lever being arranged suhstair tially parallel to the axis of said shaft and eccentric thereto, said arni being provided with spaced openings, pins arranged in said openings, Washers arranged adjacent said pins, and a roller arranged between said Washers to form a driving connection.

In testimony whereof, We affix our signatures in presence of two Witnesses.

ARTHUR E, SIBHSON. PHILIP S. WHITE. Witnesses:

ORANGE D. HALL, SAMUEL S. WHITE. 

